[Qt-interest] unresolved Symbol (QMetaObject const QwtPlot::staticMetaObject) in qwtplot derived Class

[Ian Thomson]

Hi,

Could you post a small piece of code which demonstrates the problem?

Cheers,
Ian.




Matthias Pospiech wrote:
> Arnold Krille schrieb:
>> On Thursday 11 December 2008 12:59:11 Matthias Pospiech wrote:
>>   
>>> Matthias Pospiech schrieb:
>>>     
>>>> I have the following class which is derived from QwtPlot (which is
>>>> derived from QFrame)
>>>> It includes  Q_OBJECT, a moc file is created and part of the project,
>>>> but I get this linker error:
>>>> 1>moc_QScatterPlot.obj : error LNK2001: Nicht aufgelöstes externes
>>>> Symbol ""public: static struct QMetaObject const
>>>> QwtPlot::staticMetaObject"
>>>> (?staticMetaObject at QwtPlot@@2UQMetaObject@@B)".
>>>> Why, and how do I resolve it?
>>>>       
>>> It is resolved by removing Q_OBJECT
>>> class QScatterPlot : public QwtPlot
>>> {
>>>     //Q_OBJECT
>>>     
>> Or by including the generated moc-file in your build. Either as a separate 
>> source or by including <file>.moc in your <file>.cpp...
>>
>>   
> "moc_QScatterPlot.cpp" IS part of the project and is compiled and linked.
> 
> I have not done anything different from all the other 50 Qt classes in 
> the project but only get the error with this file.
> 
> Matthias
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